Granted Patent
Utility
US 4,133,794 · App. 05/602,340
Polyester plasticizers
Inventor:
Frank Lamb
Patented Case
View Patent ↗
Granted: Jan 9, 1979
Filed: Aug 6, 1975
Inventor
Frank Lamb
Assignee (at issue)
Ciba-Geigy
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.